Tension for shuttles



E. R. HOLMES TENSION FOR SHUTTLES May 25, 1943.

Filed Nov. 26. 1942 lNv: NTO R I inn/lie: as

R. HOLM ATTORNEY Patented May 25, 1943 TENSION FOR SHUTTLES Elbridge R. Holmes, Worcester, Mass, assignor to Crompton & Knowles Loom -Works, Worcester, Mass, a corporation of Massachusetts Application November 26, 1942, Serial No. 466,986

8 Claims.

This invention relates to tensions for loom shuttles and it is the general object of the invention to provide a simple and eflicient tension which will present a smooth and uninterrupted surface to the weft and at the same time be readily assembled.

Shuttles used in narrow ware looms customarily carry a rotatable quill from which the weftis unwound as it leads to a delivery eye. In .order to prevent the delivery of excess weft rotation of the quill must be stopped at the end ofeach stroke of the shuttle. This result has been accomplished in the past by the use of afriction device held resiliently against the mass of yarn another object of my present invention toformthe pad with two parts spaced laterally to provide room to receive a carrier arm but placedto prevent substantial movement of the pad laterally of the arm.

It is a further object of my present invention to provide a tension pad formed of a single piece of material and provided with a bendable recessed arm which can be pressed into holding relation with respect to the carrier arm. The arm is formed integral with a plate having a smooth;

uninterrupted surface which will not abrade the yarn on the quill. The bendable part of the pad is on the under side of the latter and no part of the structure by which the pad is mounted on the carrier arm can engage the quill.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth.

'In the accompanying drawing, wherein a convenient embodiment of my invention is set forth, Fig. l is a front elevation of a shuttle having my invention applied thereto,

Fig. 2 is an enlarged vertical section on line 2-2, Fig. 1, showing a convenient form ofresilient mounting for the carrier arm,

Fig. 3 is a plan View of the tension .pad' on an enlarged scale,

Fig.4 isa front elevation of the pad looking in i the directiomofarrowfl, Fig; 3,

Fig. 5-is a vertical transverse section on line 5-5 of Fig. 3,

Fig. 6 is a front elevation of the pad showing the position of the holding and clamping arm before the latter is pressed into normal holding position, and

Fig. '7 is a bottom plan looking in the direction of arrow 1, Fig. 4.

Referring to the drawing, I have shown the usual type of how shuttle S having a quill Q rotatably mounted on a spindlelil which extends across the lower part of the opening 1| which receives the quill. The weft-W on the quill is led from the latter to a pair of guides l2 and then to the delivery eye l3. -As the shuttle moves back and forth in the loom the consumption of weft causes rotation of the-quill on the spindle I 0 and it is desirable that excess rotation be prevented in order that proper tension-may be maintained in the weft.

The shuttle is provided with a carrier-arm 20 mounted at one side of the opening H. The mounting may include a cylinder 2| secured in the body of the shuttle and having a fixed bearing 22 for the bent end 23 of the carrier arm. The end 23 has secured thereto acollar 24 within the cylinder and is surrounded-by a spring 25 the left end of which as shown in Fig. 2 enters the collar M while the right end enters a sleeve 26 which affords a sliding bearing for the right end of the: bent part 23. The sleeve is provided with peripheral longitudinally extending grooves '2l'- two of which are shown in Fig.2 to receive guide .pins' 28 fixed tothe cylinder 2!. A flange '29 on the cylinder limits outward movement of the sleeve. The spring exerts an upward force on the carrier arm orwire as viewed in Fig. land this force may be varied by pressing the sleeve inwardly-againstthe compressive action of spring '-25qand turning the same to change the slots2'l -whichreceive the pins 28.

The particular form of. tension shown herein is for illustrative purposes only and any similar mechanismamay'be. employed to urge the carrier arm toward the quill. Referencemaybe had to prior. Patent No.1;226,519 for a further understanding of thematter thus far described.

In carrying my present inventionainto effect I provide that end of the carrier arm remote from its pivotal connection witha pad designated generally atSBandcOmprisingpreferably abody of sheet metal havingatop plate 3| generally of rectangular form -.with rounded ,corners and havinga smooth uninterrupted upper. surface for ..engagement-of theweftiwith the. quill. One of formed with a lateral elongated recess, said carrier arm being held in the recess between said plate and said foot due to proximity of the latter to said plate, and a lip depending from said plate axially aligned with the elongated recess to cooperate with said foot to limit lateral movement of the pad relatively to said carrier arm.

3. In tension mechanism for a shuttle having a weft quill and a carrier arm mounted on the shuttle and tending to move toward the quill,

- a tension pad for the quill comprising a plate shank part 40 of the carrier arm 23 will be in-' serted between the lip 32 and the adjacent end of the foot 35 with end 31 over the recess 36, after which the foo-t is pressed from the position shown in Fig. 6 toward plate 3| to the position shown in Fig. 4. The end 31 is thus held against upward displacement out of the recess by the top plate and against lateral displacement by lip 32 and foot 35. The recess provides a loose fit with the bent end 31 of the carrier arm so that the pad is free to pivot vertically to insure contact of the top of plate 3! throughout its length with the weft and permit the pad to accommodate itself to the changing contours of the quill.

The pad is preferably made of a non-tarnishing material such as stainless steel and serves by its pressure on the weft to arrest excess rotation of the quill when the shuttle comes to rest in the loom. If the pad requires renewal the foot 35 may be bent downwardly sufficiently to permit removal of end 31 from the recess, after which a new pad may be placed on the-carrier as already described.

From the foregoing it will be seen that I have provided a tension pad having a smooth uninterrupted weft engaging surface having formed integrally therewith the foot which may be bent into position to hold the pad on the carrier arm.

It will also be seen that the-lip32 prevents lateral displacement of the pad with respect to the *carrier arm in onedirection while the foot 35 prevents displacement in the opposite direction, "and the top plate {recess 36.

holds bent end 31 in the Having thus described my invention it will be seen that changes and modifications may be made --therein-by those skilled in the art without de- {parting-from the spirit andscope of the invention and I do not wish to be limited to the'details herein disclosed, but what I claim is:

V -1. In tension mechanism for a shuttle having a weft quill and a carrier arm mounted on the shuttle andtending to move toward the quill, a

tension pad-'for the guide comprising a plate having a smooth uninterrupted surface to engage the weft on the quill, a'lip depending from one side of the plate and located at one side of the carrier arm, and a foot depending from another side of the plate and located on the opposite side of the carrier arm, said foot having a recess concave toward the plate to receive the carrier arm and extending in a direction toward and from a the lip, said foot and lip cooperating to limit lateral movement of the pad relatively to the car'- rier arm and said foot and plate cooperating to limit vertical movement of the pad relatively to 1 the carrier arm.

the plate bent thereunder-and having a free end.

having a smooth uninterrupted top surface to engage the weft on the quill, a foot integral with the plate and extending from one edge thereof under the plate along the bottom of the latter, the free end of said foot having an elongated recess transverse of the foot to receive the carrier arm, and a lip integral with said plate and axially aligned with said recess to cooperate with the foot to limit lateral movement of the pad relatively to said carrier arm.

4. In tension mechanism for a shuttle having a weft quill and a carrier arm mounted on the shuttle and tending to move toward the quill, a tension pad for the quill comprising a plate having a smooth uninterrupted top surface to engage the weft on the quill, and a foot integral with said plate and extending from one edge thereof under the plate toward the opposite edge of said plate, said foot having a transversely recessed part concave to the bottom of the plate located intermediate said edges to receive the carrier arm and provide a pivotal connection between the carrier arm and pad. 7 5. In tension mechanism for a shuttle havin a weft quill and a carrier arm mounted on the shuttle andtending to move toward the quill, a tension pad for the quill formed of sheet metal and having a plate formed with a smooth uninterrupted top surface toengage the weft on the quill, and a foot integral with one edge of said foot and provide a pivotal connection between the pad and carrier arm, said free end of said foot being bendable away from the plate to permit removal of the carrier arm from the recess.

6. A quill engaging paid for the carrier arm of a loom shuttle tension, said pad comprising a plate having a smooth uninterrupted top surface to engage the quill, and a foot integral with the plate and bent. thereunder and provided with a I free end having a transverse recess to receive the carriera fm and locate the latter between said plate and foot, said foot being bendable away from said plate to permit removal of the carrier arm from the recess.

7. A quill engaging pad for the carrier arm of a loom shuttle tension, said pad comprising a .plate having a smooth uninterrupted top surface to,engage the quill, and a foot integral with said plate and bent thereunder'and having a transverse recess concave to the plate to receive said carrier arm, said foot being bendable relatively to the plate to two positions with respect to said plate, the foot when in one position spaced from the plate permitting entry and removal of the carrier arm into and out of said recess by a motion transverse of the plane of the plate, and said foot when in the other position closer to the plate holding the carrier arm .in said recess under the plate to prevent removal of the carrier am out of the recess by a motion transverse of the plane of the plate. I

8. A quill engaging pad for the carrier arm of a loom shuttle tension, s'aid pad comprising a plate having a top smooth uninterrupted weft engaging surface, a lip integral with and dependent from the plate, a foot'integral with the plate and bent to extend thereunder, the free end of said foot having a transverse elongated recess axially aligned with said lip to receive the carrier' arm, said foot being bendable with respect to the plate so that said recess can be moved into and out of alignment with said lip.

EBB V E R. HOLMES. 

